It was still made for kids. I know many people consider it a continuation of TOS, but if you want to claim that its primary audience were adults, or that even a significant part of the audience were adults, or if even that many adults made it a point to tune it, or that it was marketed at adults... I'd have absolutely no way to prove you wrong.

Funny thing is, Clone Wars is also being defended by diehard fans to not be a kids show. Not to long ago -1 made the argument that since their are clone troopers and robots dying, it shows that it is definitely not intended to be a show for kids. If adult fans want to like something for kids, they will defend their liking it. Of course, TAS was made in an age when kids shows could be intelligent and enjoyable for adults to watch with their kids, nowadays kids shows tend to alienate adults with over the top childish antics.